DocsList services provides access to the document list

This services provides access to the document list and the files and folders in the document list. we can create files, folders, and subfolders that appear in the document list.

Here, we are going to read a Google Document as a template by Google Apps Script.

Step 1: Create a Document:

Create a document and write some text that we want to send as a template. For example:

Welcome!
This is a demo template.

Step 2: Create Google Script:

Now, create a Google Script and write the following code:

//Get Template(Document) id defined in the Project Proerties
var documentTemplateID="EmailTemplateDocId"
var emailSubject="Document Template"
var user_emailId='<email_id>'

function sendDocumentTemplate(){
 var mailBody= getDocumentTemplate();
// Sending the document Template
 GmailApp.sendEmail(user_emailId, emailSubject, mailBody);
}

/*
* It returns the document template
*/

function getDocumentTemplate() {
//Get Document ID from Project Properties
 var templateDocId= ScriptProperties.getProperty(documentTemplateID);
// Make Document's copy that would be send
 var docId= DocsList.getFileById(templateDocId).makeCopy().getId();
 var doc=DocumentApp.openById(docId);
 var body=doc.getActiveSection();
 var html=body.getText();
//Delete the document's copy after send the mail
 DocsList.getFileById(docId).setTrashed(true);
 return html;
}

Step 3: Set Project Properties

To read document, first required to mentioned the project name and document id in the project properties.

Go File -> Project Properties -> Project Properties Tab

Click on Add row. Give project name as ‘EmailTemplateDocId’ and its doc id in value field. Doc id is the document id. It displays in document url as  ‘…/document/d/<doc_Id>/edit.